# Relationship history for MSHA mine 4406845

Current hierarchy: **Steven R  Mullins → Steven R Mullins Excavating Inc → Shortridge Branch Surface Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Steven R  Mullins → Shortridge Branch Surface Mine; 1979-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sunoco, Inc. → Shortridge Branch Surface Mine; 1979-10-17 to 2012-01-16; source msha-controller-operator-history
- **controller_controls_mine:** Mullins Harold → Shortridge Branch Surface Mine; 1992-09-23 to 2001-05-06; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Top Coal Company Inc → Shortridge Branch Surface Mine; 1996-08-01 to 2001-05-06; source msha-controller-operator-history
- **controller_controls_operator:** Mullins Harold → Mountain Top Coal Company Inc; 1996-08-01 to 2001-05-06; source msha-controller-operator-history
- **operator_operates_mine:** Jewell Smokeless Coal Corp → Shortridge Branch Surface Mine; 2001-05-07 to 2001-07-04; source msha-controller-operator-history
- **controller_controls_operator:** Sunoco, Inc. → Jewell Smokeless Coal Corp; 2001-05-07 to 2001-07-04; source msha-controller-operator-history
- **operator_operates_mine:** Steven R Mullins Excavating Inc → Shortridge Branch Surface Mine; 2001-07-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven R  Mullins → Steven R Mullins Excavating Inc; 2001-07-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** SunCoke Energy Incorporated → Shortridge Branch Surface Mine; 2012-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** SunCoke Energy Incorporated → Jewell Smokeless Coal Corp; 2012-01-17 to 2001-07-04; source msha-controller-operator-history